Typewriter



June 28, 1927 1,633,665

6 J. HILGERT nrnwnnsa 7 Filed July e. 1925 Patented June 28, 1927. i I i PATENTOFF-ICE.

JOHN 'HILGERTV, or CHICAGO, rumors.

" TPEWRITERi Application filed July 6, 192,5. Seria1:Nq, 4 1;586.

This invention relates generally to imtwo of the type bars, and sometimes three of provements in typewriters and has particular the type bars will engage in jammed conreference to improved means for quickly retact just over the platen 11 as shown in the leasing two or more type bars or hammers illustrations, thus interfering with and stop- 60 which frequently become jammed together ping the operation of the typewriter until during the rapid operation of the typewriter. released by the hands of the operator.

It is an object of this invention to provide The improved release mechanism coma comparatively simple mechanism which prises a pair of supports 19 of U or channel can readily be adapted to new or existing cross section provided with bolts 20 for at- 10 typewriters and which mechanism will not tachmentto the inner face of the sides 10 of, only obviate the soiling of the operators the typewriter. hands in separating or releasing the two con- An arm 21 is pivotally mounted on the pin tacting type bars, but which improved mech- 22 on the inner upstanding'leg of each supanism will increase the efficiency of operaport 19 and a cross release bar or contact 15 tion by facilitating the speed of operation, member 23, preferably of inverted U cross since the present time consuming operation section extends between said arms 21 and is to release the iammed type bars will be resecurely attached to their free ends. duced to a minimum. Operating levers 24 are pivotally mounted The speed of operation of a typewriter on the pins 25 and extend below the keys 18 20 with the improvement here disclosed will be having terminal operating keys 24 In orparticularly apparent where the touch der to aflord a simultaneous movement of system of operation is empolyed. both operating levers 24 when either of said It is also anobject of this invention to keys 24 is operated, I preferably connect provide a mechanism of this character which same by a cross bar 26, also of inverted U 25 shall be comparatively simple in construction cross section.

and flexible in operation. If desirable, an intermediate key 27, could With these and other objects in view, my readily be attached to the cross bar 26, as

invention consists in the novel combination, shown by dotted lines in Figs. 1 and 2.

construction and arrangement of the parts The inner ends of the levers 24 are oper- 30 and members shown in the accompanying atively connected by a link 28to the pivoted diagrammatic drawings, described in the folarms 21 and coil springs 29 normally retain lowing specifications and particularly pointthe arms 21 and levers 24 in the lower ine-d out in the appended claim. operative position as shown in Fig. 3. I

Referring to the diagrammatic 'illustra- It will now be readily apparent that when 35 tions: two or more type bars 12 have been brought Fig. 1, is a plan view of a typewriter eminto inoperative contact with each other as bodying my invention; shown in Figs. 1 and 2, that the downward Fig. 2, is a cross sectional view of Fig. 1; movement of the key ends 24 will move Fig. 3, is an enlarged side elevation of my the lever 24 about their pivotal supports 25 an improved mechanism, and to thereby raise their inner ends and through Fig. .4, is a plan view of the mechanism the connecting links cause an upward moveshown in Fig. 3. ment of the free ends of the arms 21 with Referring more particularly to the diathe interconnected release bar 23, which bar grammatic illustrations, 10 indicates a type- 23 will engage the lowered key levers 15 45 writer having sides 10 and a platen 11. The of the respective contacting type bars 12 to type bars 12 are shown here pivotally mountthereby release their engagement. ed on the segmental bearing 13 and adapted I claim: for operation by the keys 14 through suit- In a typewriter having a plurality of pivable mechanisms indicated generally by nu oted type-bars and mechanism for operating 50 meral 15 having segmental racks 16 which said type-bars, a pair of supports, an arm operatively engage the segmental gear-like pivotally mounted on each support, a con teeth 17 on the pivotal portion of the type tact member connected with and extending bars. The space bar is indicated by .nubetween said arms, and adapted for movemeral18. ment with said arms, said contact member 55 As above pointed out, it frequently occurs extending below said mechanism, a lever pivthat when the keys 14 are rapidly operated, ot-ally mounted on each of said supports below said arm, links connecting said levers with said arms, a spring connected to each of said levers for normally retaining said arms and contact member in lowered position, and a cross bar connecting said levers at their outer operative ends to afford simultaneous movement of same whereby a downward movement of the outer ends of said levers will cause an upward movement of said arms with the connecting contact mem- 10 her into engagement with underside of said mechanism to thereby release the engaged type-bars.

In witness whereof I aflix my signature.

JOHN HILGERT. 

